vim /etc/docker/daemon.json在daemon中配置一下dns
{"registry-mirrors": ["https://docker.m.daocloud.io","https://hub-mirror.c.163.com","https://dockerproxy.com","https://docker.mirrors.ustc.edu.cn","https://docker.nju.edu.cn"],"dns" : ["114.114.114.114","8.8.8.8"]
}
检测：
docker run hello-world
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——Mcu模块配置及代码详解(上))
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